tcpdump01: New test

Update #4650.

libbsd.py

@@ -5588,6 +5588,7 @@ class tests(builder.Module):
         self.addTest(mm.generator['test']('ipsec01', ['test_main']))
         self.addTest(mm.generator['test']('openssl01', ['test_main']))
         self.addTest(mm.generator['test']('openssl02', ['test_main']))
+        self.addTest(mm.generator['test']('tcpdump01', ['test_main']))
 
 def load(mm):
 

testsuite/tcpdump01/test_main.c

@@ -0,0 +1,292 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @brief Tests the tcpdump command.
+ */
+
+/*
+ * Copyright (C) 2022 embedded brains GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <vm/uma.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <err.h>
+
+#include <assert.h>
+#include <ck_epoch.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rtems.h>
+#include <rtems/bsd/bsd.h>
+#include <rtems/console.h>
+#include <rtems/libcsupport.h>
+
+#include <machine/rtems-bsd-commands.h>
+
+#define TEST_NAME "LIBBSD TCPDUMP 1"
+
+typedef struct {
+	rtems_id main_id;
+	int sp[2];
+} test_context;
+
+static test_context test_instance;
+
+static void
+epoch_cleanup(void)
+{
+	rtems_status_code sc;
+
+	sc = rtems_task_wake_after(CK_EPOCH_LENGTH);
+	assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void
+init_addr(struct sockaddr_in *addr)
+{
+	int ok;
+
+	memset(addr, 0, sizeof(*addr));
+	addr->sin_family = AF_INET;
+	addr->sin_port = htons(1234);
+	ok = inet_aton("127.0.0.1", &addr->sin_addr);
+	assert(ok != 0);
+}
+
+static rtems_id
+start_task(rtems_task_entry entry, void *arg)
+{
+	rtems_task_priority prio;
+	rtems_id id;
+	rtems_status_code sc;
+
+	sc = rtems_task_set_priority(RTEMS_SELF, RTEMS_CURRENT_PRIORITY, &prio);
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	sc = rtems_task_create(rtems_build_name('T', 'E', 'S', 'T' ), prio - 1,
+	    32 * 1024, RTEMS_DEFAULT_MODES, RTEMS_DEFAULT_ATTRIBUTES, &id);
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	sc = rtems_task_start(id, entry, (rtems_task_argument)arg);
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	return id;
+}
+
+static void
+test_tcpdump_help(void)
+{
+	char *argv[] = {
+		"tcpdump",
+		"-h",
+		NULL
+	};
+	rtems_resource_snapshot snapshot;
+	int exit_code;
+
+	rtems_resource_snapshot_take(&snapshot);
+
+	exit_code = rtems_bsd_command_tcpdump(RTEMS_BSD_ARGC(argv), argv);
+	assert(exit_code == 0);
+
+	assert(rtems_resource_snapshot_check(&snapshot));
+}
+
+static const char raw_packets_file[] = "packets.bin";
+
+static void
+run_tcpdump_write_raw_packets(rtems_task_argument arg)
+{
+	test_context *ctx;
+	FILE *file;
+	FILE *saved_stdin;
+	FILE *saved_stdout;
+	FILE *saved_stderr;
+	int rv;
+	char *argv[] = {
+		"tcpdump",
+		"-n",
+		"-i",
+		"lo0",
+		"-w",
+		RTEMS_DECONST(char *, raw_packets_file),
+		NULL
+	};
+	int exit_code;
+	rtems_status_code sc;
+
+	ctx = (test_context *)arg;
+
+	saved_stdin = stdin;
+	saved_stdout = stdout;
+	saved_stderr = stderr;
+
+	file = fdopen(ctx->sp[1], "r+");
+	assert(file != NULL);
+
+	stdin = file;
+	stdout = file;
+	stderr = file;
+
+	exit_code = rtems_bsd_command_tcpdump(RTEMS_BSD_ARGC(argv), argv);
+	assert(exit_code == 0);
+
+	stdin = saved_stdin;
+	stdout = saved_stdout;
+	stderr = saved_stderr;
+
+	rv = fclose(file);
+	assert(rv == 0);
+
+	sc = rtems_event_transient_send(ctx->main_id);
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	rtems_task_exit();
+}
+
+static void
+test_tcpdump_write_raw_packets(test_context *ctx)
+{
+	char *argv[] = {
+		"tcpdump",
+		"-n",
+		"-r",
+		RTEMS_DECONST(char *, raw_packets_file),
+		NULL
+	};
+	rtems_resource_snapshot snapshot;
+	int in;
+	int out;
+	int rv;
+	char c;
+	ssize_t n;
+	struct sockaddr_in addr;
+	socklen_t addr_len;
+	rtems_status_code sc;
+	int exit_code;
+
+	rtems_resource_snapshot_take(&snapshot);
+
+	rv = socketpair(PF_UNIX, SOCK_STREAM, 0, ctx->sp);
+	assert(rv == 0);
+
+	start_task(run_tcpdump_write_raw_packets, ctx);
+
+	init_addr(&addr);
+
+	in = socket(PF_INET, SOCK_DGRAM, 0);
+	assert(out >= 0);
+
+	rv = bind(in, (const struct sockaddr *) &addr, sizeof(addr));
+	assert(rv == 0);
+
+	out = socket(PF_INET, SOCK_DGRAM, 0);
+	assert(out >= 0);
+
+	c = 'x';
+	n = sendto(out, &c, sizeof(c), 0,
+	    (const struct sockaddr *) &addr, sizeof(addr));
+	assert(n == 1);
+
+	c = 'y';
+	addr_len = sizeof(addr);
+	n = recvfrom(in, &c, sizeof(c), 0,
+	    (struct sockaddr *) &addr, &addr_len);
+	assert(n == 1);
+	assert(c == 'x');
+
+	/* The tcpdump pcap read timeout is 1000ms */
+	sc = rtems_task_wake_after(rtems_clock_get_ticks_per_second());
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	c = 'q';
+	n = write(ctx->sp[0], &c, sizeof(c));
+	assert(n == 1);
+
+	rv = close(out);
+	assert(rv == 0);
+
+	rv = close(in);
+	assert(rv == 0);
+
+	sc = rtems_event_transient_receive(RTEMS_WAIT, RTEMS_NO_TIMEOUT);
+	assert(sc == RTEMS_SUCCESSFUL);
+
+	rv = close(ctx->sp[0]);
+	assert(rv == 0);
+
+	exit_code = rtems_bsd_command_tcpdump(RTEMS_BSD_ARGC(argv), argv);
+	assert(exit_code == 0);
+
+	rv = unlink(raw_packets_file);
+	assert(rv == 0);
+
+	epoch_cleanup();
+	assert(rtems_resource_snapshot_check(&snapshot));
+}
+
+static void
+test_main(void)
+{
+	test_context *ctx;
+	FILE *file;
+	int rv;
+
+	ctx = &test_instance;
+	ctx->main_id = rtems_task_self();
+
+	/* Fill dynamic file pool in Newlib */
+	file = fopen(CONSOLE_DEVICE_NAME, "r+");
+	assert(file != NULL);
+	rv = fclose(file);
+	assert(rv == 0);
+
+	/*
+	 * Stop interferences of uma_timeout() which may need some dynamic
+	 * memory.
+	 */
+	rtems_uma_drain_timeout();
+
+	rtems_bsd_ifconfig_lo0();
+	epoch_cleanup();
+
+	test_tcpdump_help();
+	test_tcpdump_write_raw_packets(ctx);
+
+	exit(0);
+}
+
+#include <rtems/bsd/test/default-init.h>